the Tools Of Our Builds - tungsten - Photo 08

A torch uses a number of color-coded, nonconsumable tungsten electrodes for different materials, such as aluminum. Red is 1.8 to 2.2 percent thoriated tungsten (ThO2) and is for greater arc stability, higher current capacity, easy arc starting, and resistance to weld contamination. Green is pure tungsten for good arc stability and AC welding. Orange is 1.8 to 2.2 percent ceriated tungsten (CeO2) for good arc stability and easy arc starting.